Jointed rubber-covered mask



Ma a, 1944. J. M. ESCHER 2,348,335

JOINTED RUBBER-COVERED MASK Filed May 14, 1941 1 N VENT OR.

D STATES TENT OFFICE EOINTED RUBBER-COVERED MASK Joseph M. Escher, Pittsburgh, Pa, assignor to .las. H. Matthews & Company, Pittsburgh, Pa., a corporation of Pennsylvania Application May 14, 1941, Serial No. 393,358

2 Claims. (Cl. 4139) KJNIT it.

This invention relates to new and useful imis folded end to end, arrange themselves in provements in design masks or stencils for use abutting relation as shown in Fig. 4. in sandblasting ornamentations on glass articles A clamp 3 is hinged to the end bracket 1 by or the like, and it is among the objects thereof a pivot pin 9, and when the end brackets are to provide a rubber-covered mask of a jointed 5 brought in abutting engagement the clamp is construction which is especially designed to folded down, over the end brackets, as shown adapt itself to the shape and contour of the in Fig. 4, to maintain the mask in its cylindrical article to which it is applied. form.

Heretofore such design masks have been con- This construction of mask readily adapts itstructed of a sheet metal body with a substanself to the contour of the article to which the tially heavy body of rubber on both sides of the design is applied by blasting with an abrasive sheet metal to give it rigidity and strength, the material through the cut-outs 5, and in addirubber protecting the stencil from the action of tion to the conforming feature of the multiple the abrasive blast. strip construction the mask will permit of some Where the mask is applied to cylindrical or degree of stretch for the joints 4 to aid in fitother round-shaped articles, the mask was ting the m to t e article by Clamping thereonusually hinged at the center and curv d t th No invention is claimed in the use of a rubbercontour of the article before clamping the same covered stencil for sand blast design, but only thereto. i the jointed construction of the mask as de- In accordance with the present invention, the sc bed.

metallic body portion is constructed of a plural- While the metal strip l e Shown as pe ity of relatively narrow strips which are em n 1 to adapt th mask to e 001110911 pe. bedded in the rubber protecting surfaces so that they y be parallel for cylindrical forms as they will freely hinge at the. joint and adapt that shown in Fig. 4.

themselves to the contour of the article to which I claim:

the mask is applied. The invention will become 1. A die mask of the character described conmore apparent from a consideration of the acst n o a p u y of closely Spaced flat tacompanying drawing constituting a part hereof pered strips arranged on their fiat sides in a in which like reference characters designate like horizontal plane having a rubber coating on parts, and in which: both sides thereof and having rubber formed Fig. 1 is a top plan view of a design mask or integrally with the coating material disposed stencil embodying the principles of this invenbetween adjacent strips forming hinges for flextion; ible joints.

Fig. 2 an end view taken along the line 2--2; 2. A design mask of the character described Fig. 3 a cross-sectional view taken along the consisting of a plurality of closely spaced flat line 3-3, Fig. 1; and metal strips arranged on their flat sides in a Fig. 4 an end elevational view of the stencil horizontal plane having arubber coating on both curved to a cylindrical form and clamped in its sides thereof and having rubber formed intecurved position. grally with the coating material to constitute With reference to the drawing, reference nuthe faces of the mask, said mask having cutmeral I designates a plurality of strips of sheet out portions constituting designs and having L- metal vulcanized between layers of rubber 2 and shaped members secured on the end strips of 3 with rubber joints 4 interposed between adjathe mask to constitute abutments when the mask cent metal strips. The mask is out out with deis folded to a circular shape, and a U-shaped signs, such as the heart-shaped design desig- 5 clamping member adapted to engage the legs of nated by the numeral 5, by punching the same the abutting L-shaped members to retain them through the rubber and metal. in their abutting relation.

The end pieces of the mask are provided with L-shaped brackets 6 and l which, when the mask JOSEPH M. ESCHER. 

